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Sensory evoked potentials: a system for clinical testing and patient monitoring

  • J. Robert Boston
  • Lee G. Deneault
Article

Abstract

There is increasing interest in the use of averaged sensory evoked potentials for diagnostic testing and patient monitoring. This testing technique offers an opportunity to obtain information on function in the central nervous system and can be used in uncooperative and comatose patients. However, in the clinical situation background noise is often high, due for example to posturing by the patient, and even with extensive signal averaging it can be difficult to determine whether a response is present. This paper describes a data acquisition technique we have implemented for patient testing in the intensive care unit and the operating room to facilitate analysis of the responses. The averaging system delivers the stimulus in the middle of the data window, providing a pre-stimulus control interval from which to estimate residual background noise in the average. In addition, two averages are formed simultaneously to determine reproducibility of the response. This technique has been modified to provide a method of continuous monitoring that allows rapid detection of large changes in the response plus automatic tracking of selected response peak parameters.

Keywords

sensory evoked potentials signal averaging automatic peak detection algorithm retromastoid craniectomy procedures 

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References

  1. 1.
    Grundy BL: Intraoperative monitoring of sensory-evoked potentials. Anesthesiol 58: 72–87, 1983.CrossRefGoogle Scholar
  2. 2.
    Greenberg RP, Newlon PG, Hyatt MS, Narayan RK, Becker DP: Prognostic implications of early multimodality evoked potentials in severely head-injured patients. J Neurosurg 55: 227–236, 1981.PubMedCrossRefGoogle Scholar
  3. 3.
    Hume AL, Cant BR: Central somatosensory conduction after head injury. Ann Neurol 10: 411–419.Google Scholar
  4. 4.
    Boston JR: Evoked potential data management. Proc 4th annual mtg, IEEE-GEMB, Philadelphia, PA, 1982.Google Scholar

Copyright information

© Martinus Nijhoff Publishers 1984

Authors and Affiliations

  • J. Robert Boston
    • 1
  • Lee G. Deneault
    • 1
  1. 1.Department of Anesthesiology and Critical Care MedicineUniversity of Pittsburgh School of MedicinePittsburghU.S.A.

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